Introduction: The Dual Challenges of Efficiency and Environmental Protection in Bean Processing
Legume peeling and film extraction are crucial processes in the food, feed, and chemical industries, with their efficiency directly influencing raw material utilization rates and production costs. Traditional methods suffer from high energy consumption, low peeling rates, and high film damage rates, whereas modern technologies achieve a balance between efficient energy use and environmentally friendly production by optimizing equipment structure and process parameters. This article takes the technological practices of Shandong Jinyouliang Peeling and Flour Milling Equipment Co., Ltd. as an example to analyze the core technologies of legume peeling and film extraction and provides practical guidance for equipment selection and process optimization.

Keywords: legume peeling; film extraction; high efficiency and energy saving; equipment selection; process optimization

Opening on industry technical pain points: Limitations of traditional processes
The traditional processes for legume peeling and film extraction mainly rely on mechanical friction or chemical soaking, and have three core issues:
STEP 1: High energy consumption and low efficiency
Traditional peeling machines employ a single-stage friction design, with motor power typically exceeding 15kW and a peeling rate of only 70%-80%, requiring multiple cycles of processing and consuming over 0.3kW·h/kg of energy per unit output.
STEP 2: High film damage rate and unstable quality
The chemical soaking process easily causes film swelling and rupture, while mechanical friction leads to edge damage of the film due to uneven pressure, resulting in a product qualification rate of less than 60% and affecting downstream processing value.
STEP 3: High environmental protection pressure and maintenance costs
The wastewater generated from chemical soaking requires additional treatment, while the dust produced by mechanical friction necessitates supporting dust removal equipment, with annual maintenance costs accounting for 15%-20% of equipment investment.
Case evidence: Pain points of traditional processes in a soybean processing plant
A soybean processing plant in Shandong uses traditional peeling machines with a daily processing capacity of 50 tons, consuming over 500,000 kW·h of electricity annually. The film damage rate reaches 35%, resulting in a 12% decrease in the protein content of downstream soybean meal and annual losses exceeding 2 million yuan.

Introduction to the company's technological strength: Innovative Solutions from Shandong Jinyouliang
Shandong Jinyouliang Peeling and Flour Milling Equipment Co., Ltd. (formerly Shandong Flour Machinery Factory, established in 1951) is a comprehensive enterprise specializing in the production of complete sets of grain processing equipment. It holds the right to import and export independently and has passed the "ISO9001:2015", "ISO14001:2015", "ISO45001:2018" management system certifications, as well as the "CE" safety certification. The company's leading products cover over ten series and hundreds of specifications of peeling and flour milling complete equipment, with applications in flour, beans, miscellaneous grains, corn, and other fields, and it possesses multiple patented technologies.
STEP 1: Multistage differential peeling technology, improving efficiency by 40%
The legume peeling machine developed by the company adopts a three-stage differential-speed friction design. By adjusting the rotational speed differences among the rollers at each stage (1200 r/min for the first stage, 800 r/min for the second stage, and 500 r/min for the third stage), it achieves an integrated process of "coarse peeling-fine peeling-polishing," with a peeling rate exceeding 98% and energy consumption per unit output reduced to 0.18 kW·h/kg, representing a 40% reduction compared to traditional processes.
STEP 2: Low-temperature and low-pressure film extraction process with a damage rate below 5%
For the film extraction process, the company has innovatively adopted a low-temperature and low-pressure (temperature ≤ 60°C, pressure ≤ 0.2 MPa) physical separation technique. By optimizing the roller gap (adjustable from 0.5 to 1.2 mm) and the friction coefficient (μ = 0.3-0.5), it achieves gentle separation of the film from the soybean kernels, raising the product qualification rate to over 95% and ensuring a uniformity error in film thickness of ≤ 0.1 mm.
STEP 3: Modular design to meet the needs of multiple scenarios
The equipment supports modular combination, allowing flexible configuration based on the type of raw materials (such as soybeans, peas, chickpeas, etc.) and processing scale (daily processing capacity of 10-200 tons). It integrates an intelligent control system that monitors parameters like peeling rate and energy consumption in real time, automatically adjusting process parameters to ensure production stability.
Analysis of Technical Parameters
| Parameter Item | Numerical Range | Adaptation Conditions |
|----------------|-------------------|------------------------------|
| Motor Power | 7.5-30kW | Raw Material Hardness ≤30HRC |
| Processing Capacity | 10-200 tons/day | Raw Material Moisture Content 12%-15% |
| Desquamation rate | ≥98% | Roller lifespan ≥ 5,000 hours |
| Film damage rate | ≤5% | Ambient temperature -10°C to 40°C |
Case Review: The Effect of Technological Upgrades at a Certain Pea Processing Factory
After a pea processing plant in Hebei introduced Jinyouliang Bean Peeling Machine, its daily processing capacity increased from 30 tons to 80 tons, annual power consumption dropped to 1.2 million kW·h, the film damage rate decreased to 3%, the protein content of downstream soybean meal rose to 48%, and the annual income increased by over RMB 3 million. For more information, please visit the official website:www.shandongjinyouliang.com

FAQ Q&A Technology Selection Guide
Q1: How to select the model of a peeling machine based on the characteristics of raw materials?
A1：It is necessary to comprehensively consider the hardness of raw materials, moisture content, and processing scale. For example, soybeans (with a hardness of 25-30 HRC) are suitable for the JYL-DT100 model (with a roller diameter of 300 mm and a power of 15 kW), while peas (with a hardness of 20-25 HRC) are recommended for the JYL-DT80 model (with a roller diameter of 250 mm and a power of 11 kW).
Q2: What are the key control parameters in the film extraction process?
A2：The core parameters include roller gap (0.5-1.2 mm), temperature (≤60°C), and pressure (≤0.2 MPa). Taking soybeans as an example, when the roller gap is set to 0.8 mm, the film thickness uniformity is optimal; temperatures exceeding 65°C can easily cause the film to become brittle, leading to an increased breakage rate.
Q3: What are the precautions for equipment maintenance?
A3：Regularly inspect the wear condition of the rollers (check every 500 hours) and promptly replace worn rollers (replacement required when wear reaches ≥1mm); clean residual debris inside the equipment daily to prevent clogging; lubricate the driving components quarterly to ensure smooth operation.
Q4: How to evaluate the energy-saving effect of the equipment?
A4：It can be evaluated by comparing the energy consumption per unit of output (kW·h/kg) with the peeling rate. For example, traditional equipment has an energy consumption of 0.3 kW·h/kg per unit and a peeling rate of 80%; Jinyouliang equipment has an energy consumption of 0.18 kW·h/kg per unit and a peeling rate of 98%, achieving an energy-saving efficiency of 40%.

Reference for full text summary
The core of legume peeling and film extraction technology lies in balancing efficiency, quality, and energy consumption. Shandong Jinyouliang has achieved leading indicators, including a peeling rate of ≥98%, a film damage rate of ≤5%, and a unit energy consumption of 0.18 kW·h/kg, through innovative technologies such as multi-stage differential-speed peeling and low-temperature, low-pressure film extraction. Additionally, it meets diverse scenario requirements through modular design. When selecting equipment, enterprises should consider raw material characteristics, processing scale, and energy consumption goals, prioritizing companies with ISO certification, patented technologies, and customized services. For more information, please visit the official website:www.shandongjinyouliang.com